3 results filtered with: Spirals
- Pictures
- Online
Civil engineering: the pier at Madras, India, built using screw piles (helical piles). Wood engraving, 1863.
Date: February 28 1863Reference: 44532i- Books
Ismaelis Bullialdi De lineis spiralibus demonstrationes novae / [Ismael Boulliau].
Boulliau, Ismael, 1605-1694.Date: 1657
- 3-D Objects
- Online
Tusk of the narwhal (Monodon monoceros), or horn of the unicorn.
Reference: 47281i